836 is a weird number. Its factorization is 22 × 11 × 19, so its divisors are 2, 4, 11, 19, 22, 38, 44, 76, 209, and 418. They sum to 843. As this is greater than 836, it is an abundant number, but no subset sums to 836, so it is not a semiperfect number; therefore it is weird.